Do we have a free will when we make a decision with time travel? Is the past fixed, and the future a set fate or destiny? The linear model of time doesn’t account that knowledge of the future affects the past, when even logic would suggest that is so. Alternative (multidimensional) models, such as those given by quantum mechanics would perform better. The future is yours. So is your history!
Is energy released in time travel?
A huge obstacle in time travel is the vast amounts of energy needed to power it. What if we could borrow and pay back energy by moving it through time?